Williamsite and Lazurite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.51-2.63
2.75
Fracture
Conchoidal, Conchoidal, Handbook of mineralogy (2001)
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Not Available
Imperfect on {110}
Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Williamsite and Lazurite Chemical Formula
While comparing Williamsite and Lazurite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Williamsite and Lazurite chemical formula.
- Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Williamsite and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Williamsite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Williamsite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Williamsite is 2.75 whereas that of Lazurite is 2.75.